PDR DETAILED SLIDES

Charger Rocket Works

University of Alabama in Huntsville

NASA Student Launch 2013-14

Kenneth LeBlanc (Project Lead)Brian Roy (Safety Officer)Chris Spalding (Design Lead)Chad O’Brien (Analysis Lead)Wesley Cobb (Payload Lead)

Launch Plans• Organizations

• Huntsville Area Rocketry Association (HARA) with Field in Manchester, TN or Bragg Farms, Toney, AL

• Phoenix Missile Works with Field in Childersburg, AL

• Subscale/Component Tests• February 8-9: Childersburg, AL• March 8-9: Childersburg, AL• March 8: Manchester, TN

• Full Scale Tests• March 16: Bragg Farms, Toney, AL• April 5-6: Childersburg, AL• April 13: Manchester, TN• April 20-21: Bragg Farms, Toney, AL

Supersonic Design Considerations• Superheated Skin• Aerodynamic Forces• Rigidity

Subscale Plans

• Modified ARCAS kit with Nose Cone Profile• Level 2 Motors• Simulate high G loading• Test Sensors

Motor• CTI M4770• Complex Motor Assembly

• Separate Glue/Epoxy• Time Dependent

• Jason Winningham will assemble

Launch Rail• Rail Buttons

• 1”• Locations

• Lower Button – Approximately Fin’s mid chord.• Top button – 24 inches above lower

• Rail• 8ft• 1in

• Rail Exit Speed – 131ft/s

Descent

Event Value UnitsDrogue Release 26 seconds

High Altitude Descent Speed 100 ft/sMain Release 1000 ft

Low Altitude Descent Speed 7 ft/sImpact Energy Bottom Section 15.9 lbf

Impact Energy Nose Cone 0.83 lbf

176 176.5 177 177.5 178-100

-90

-80

-70

-60

-50

-40

-30

-20

-10

0

10

900

920

940

960

980

1000

1020

1040

1060

1080

1100

Descent

Velocity

Altitude

Time (sec)

Vel

oci

ty (

ft/s

)

Alt

itu

de

(ft)

Drift

High G Considerations• Materials

• 3-D printed material brittle• 6061 Al used at critical interface points

• Sensors• Subscale ARCAS test launches with similar conditions• Inspect parts for damage• Check for usable data

Payload Bay• Build envelope

• Size defined by subscale Nanolaunch dimensions• Preliminary designs allow for some size increase• Dielectrophoresis improvements, no significant volume increase

• Payload at or Close to CG• Dielectrophoresis• Part of Nanolaunch

• Forward payload• Radio and tracking• Additional Nanolaunch Payload

CRW Safety Plan• MSDSs, SOPs, and State and Federal regulations.• SOP reviews. • CPR/ AED training.• Facility usage policies.

Parachute Design References• FAA Rigger Handbook (344pages)• The Parachute Recovery Systems Design Manual (T.W.

Knacke). (~730 pages)• Two Parachute manuals on hardware, materials, sewing,

equipment, etc…

Dielectrophoresis

• Problems• Cryogenic boil off – Muratov (2011)

• Loss of useable propellant • Vapor bubbles develop

• Liquid collection for engine restart – Blackmon (1965)

• Solution• Non-Mechanical fluid manipulation device

• Consolidate fuel away from tank walls to reduce heat transfer• Easily collect fluid at key locations while reducing dangerous

vapor regions

What is Dielectrophoresis?•Gradient : [∂/∂x, ∂/∂y,∂/∂z]•Polarity Independence

2: Blackmon, James. Collection of Liquid Propellants in Zero Gravity with Electric Fields. Journal of Spacecraft and Rockets, Vol. 2, No. 3, 1965. p 3.

Uniform Electric Field

Non-Uniform Electric Field

Experiment Fluids

• Experiment fluids with comparable dielectric constants to common fuels

• Common fluids for comparison of dielectric constants

• Peanut oil chosen• Highest dielectric constant of

experimental fluids• Theoretically most responsive to

dielectrophoretic force

Mass Statement

Supporting Personnel• Dr. Robert Frederick

• PRC Director• UAH Faculty for past 20

years• Propellants and Energetics• USLI Academic Advisor

• Dr. David Lineberry • PRC Research Scientist • 10 Years of Experience• NAR / TRA (Level) 1• NSL Course Instructor

• Tony Hall• PRC Test Engineer• 10 Years of Experience

• Jason Winningham• NAR/TRA Level 2 • HARA Member• UAH Employee• Previous NASA Rocketry

Workshop Leader• Amit Patel

• PRC GRA• HARA Member• 2012-13 CRW Project

Manger• NRA / TRA Level 1• Current Team Member